Book holding rack



FIG. 1 is a front perspective view of a book holding rack showing my newdesign;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a side elevational view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a rear elevational view thereof.

The ornamental design for book holding rack, as shown and described.